JP2008142746A - Metal wire drawing method - Google Patents

Metal wire drawing method Download PDF

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JP2008142746A
JP2008142746A JP2006333365A JP2006333365A JP2008142746A JP 2008142746 A JP2008142746 A JP 2008142746A JP 2006333365 A JP2006333365 A JP 2006333365A JP 2006333365 A JP2006333365 A JP 2006333365A JP 2008142746 A JP2008142746 A JP 2008142746A
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lubricating liquid
wire drawing
metal wire
emulsion
wire
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JP5196776B2 (en
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Itaru Ando
到 安東
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Bridgestone Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a metal wire drawing method capable of preventing ingress of any insoluble built-up waste into a wire drawing die, and preventing any surface roughness or degradation of ductility of the metal wire to be drawn. <P>SOLUTION: In the metal wire drawing method for drawing a metal wire 8 by a wire drawing die 7 in a lubricating liquid tank 6 filled with an emulsion lubricating liquid 5, the emulsion lubricating liquid 5 in the emulsion lubricating liquid tank 6 used for the wire drawing for a predetermined time is fed to a centrifugal separator 3, the emulsion lubricating liquid is subjected to the centrifugal separation by the centrifugal separator at the gravity acceleration of 30 to 150G, and after removing the insoluble built-up waste in the emulsion lubricating liquid 5, the emulsion lubricating liquid is returned to the lubricating liquid tank 6 as an emulsion lubricating liquid 5 to be used for the wire drawing. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、伸線処理される金属線材の表面荒れや延性劣化を防止できるとともに伸線ダイスの寿命の向上を図ることの可能な金属線材伸線方法に関する。   The present invention relates to a metal wire drawing method capable of preventing surface roughness and ductility deterioration of a metal wire to be drawn and improving the life of a wire drawing die.

タイヤ補強用スチールコードの素線に用いられるブラスメッキスチールワイヤのような金属線材の製造においては伸線機を用いた湿式伸線処理が行なわれており、伸線機で使用される潤滑液としては、エマルジョン潤滑液が用いられる。エマルジョン潤滑液とは、界面活性作用を有する乳化剤によって、油分が水中に微粒粒子となって分散、浮遊して水分と油分とが混合された状態で安定に保たれた潤滑液である。このように、油成分を界面活性剤で乳化させたエマルジョン潤滑液（以下、潤滑液と略す）は、伸線機において伸線処理に使用され続けることで、潤滑液中の、金属粉、メッキ粉、劣化油分などの異物（以下、不溶性蓄積不要物という）が増加する。そして、伸線の際に不溶性蓄積不要物が伸線機の伸線ダイスと金属線材との間に侵入することによって、伸線ダイスと金属線材との潤滑性が低下し、金属線材の表面荒れや延性劣化、及び、伸線ダイスの寿命の悪化を招く。このため、伸線機にて伸線処理に一定時間使用された潤滑液を遠心分離機に送って遠心分離機によって潤滑液に数１０００Ｇ程度の重力加速度を加えることで潤滑液中の不溶性蓄積不要物を分離除去する方法が知られている。
特開２００２−４５６０９号公報 特開平５−５７３１４号公報 In the production of metal wires such as brass-plated steel wires used for steel reinforcement wires for tire reinforcement, wet wire drawing using a wire drawing machine is performed, and as a lubricant used in the wire drawing machine An emulsion lubricant is used. The emulsion lubricating liquid is a lubricating liquid that is stably maintained in a state where the oil is dispersed as fine particles in water and suspended and mixed with water and oil by an emulsifier having a surface active action. As described above, an emulsion lubricating liquid (hereinafter abbreviated as a lubricating liquid) in which an oil component is emulsified with a surfactant is continuously used for wire drawing in a wire drawing machine, so that metal powder and plating in the lubricating liquid can be obtained. Foreign substances such as powder and deteriorated oil (hereinafter referred to as insoluble accumulation unnecessary substances) increase. In addition, insoluble accumulation unnecessary substances enter between the wire drawing die and the metal wire of the wire drawing machine at the time of wire drawing, so that the lubricity between the wire drawing die and the metal wire is lowered, and the surface of the metal wire is roughened. Further, the ductility deterioration and the life of the wire drawing die are deteriorated. For this reason, insoluble accumulation in the lubricating liquid is unnecessary by sending the lubricating liquid used for a certain period of time in the wire drawing machine to the centrifuge and applying a gravitational acceleration of several thousand G to the lubricating liquid by the centrifuge. A method for separating and removing a substance is known.
JP 2002-45609 A JP-A-5-57314

しかしながら、伸線機で使用された潤滑液に遠心分離機で数１０００Ｇ程度の重力加速度を加えると、潤滑液中の水分と油分とが分離してしまい、このような水分と油分とが分離した潤滑液を用いて伸線処理を行うと、潤滑液の潤滑性能が低下して伸線ダイスと金属線材との潤滑性が低下する。また、金属線材の表面の酸化や時効硬化による金属線材の延性劣化を抑制しようとして潤滑液を冷却して金属線材の温度を低く保つようにした場合、潤滑液中の油分の粒子の径が大きくなって、潤滑液の伸線ダイスへの引き込み性が悪くなり、伸線ダイスと金属線材との潤滑性が低下するので、伸線された金属線材の表面が酸化したり、時効硬化によって金属線材の延性が劣化する。   However, when a gravity acceleration of several thousand G is applied to the lubricating liquid used in the wire drawing machine by a centrifugal separator, the water and the oil in the lubricating liquid are separated, and the water and the oil are separated. When the wire drawing process is performed using the lubricating liquid, the lubricating performance of the lubricating liquid is lowered, and the lubricity between the wire drawing die and the metal wire is lowered. In addition, when the lubricating liquid is cooled to keep the temperature of the metal wire low in order to suppress the ductile deterioration of the metal wire due to oxidation or age hardening of the metal wire, the diameter of the oil particles in the lubricating liquid is large. As a result, the drawability of the lubricating liquid into the wire drawing die is deteriorated and the lubricity between the wire drawing die and the metal wire is lowered, so that the surface of the drawn metal wire is oxidized or the metal wire is aged by age hardening. The ductility of the steel deteriorates.

本発明は、金属線材をエマルジョン潤滑液の満たされた潤滑液槽中で伸線ダイスによって伸線処理する金属線材伸線方法において、一定時間伸線処理に使用されたエマルジョン潤滑液槽内のエマルジョン潤滑液を遠心分離機に送って遠心分離機にて３０Ｇ以上１５０Ｇ以下の重力加速度で遠心分離処理することによってエマルジョン潤滑液中の不溶性蓄積不要物を除去した後に伸線処理に使用するエマルジョン潤滑液として潤滑液槽に戻して伸線処理を行うことを特徴とする。
一定時間伸線処理に使用されたエマルジョン潤滑液を遠心分離機で遠心処理することによってエマルジョン潤滑液中に含まれた２０μｍを超える粒子を除去したことも特徴とする。 The present invention relates to a metal wire drawing method in which a metal wire is drawn by a drawing die in a lubricating liquid tank filled with an emulsion lubricating liquid, and an emulsion in an emulsion lubricating liquid tank used for a predetermined time of drawing. Emulsion lubricating liquid used for wire drawing after removing insoluble accumulation unnecessary substances in emulsion lubricating liquid by sending the lubricating liquid to centrifuge and centrifuging with gravity acceleration of 30G or more and 150G or less in centrifuge As described above, the wire drawing process is performed after returning to the lubricating liquid tank.
It is also characterized in that particles exceeding 20 μm contained in the emulsion lubricating liquid are removed by centrifuging the emulsion lubricating liquid used for the wire drawing treatment for a certain time with a centrifuge.

本発明によれば、遠心分離機にて３０Ｇ以上１５０Ｇ以下の重力加速度で遠心分離処理することによって不溶性蓄積不要物の除去された潤滑液を潤滑液槽に戻して伸線処理を行うことで、伸線機の伸線ダイスへの不溶性蓄積不要物の進入を防止でき、伸線処理される金属線材の表面荒れや延性劣化を防止できるとともに、伸線ダイスの寿命が向上する。
遠心分離処理によって粒径２０μｍを超える粒子の除去された潤滑液を潤滑液槽に戻して伸線処理を行うことで、潤滑液の伸線ダイスへの引き込み性が良くなり、伸線ダイスと金属線材との潤滑性が向上するので、伸線処理される金属線材の表面荒れや延性劣化を防止できるとともに、伸線ダイスの寿命が向上する。 According to the present invention, by performing a centrifugal separation process with a centrifugal acceleration at a gravitational acceleration of 30 G or more and 150 G or less, the lubricating liquid from which insoluble accumulation unnecessary substances have been removed is returned to the lubricating liquid tank and the wire drawing process is performed. It is possible to prevent the insoluble accumulation unnecessary material from entering the wire drawing die of the wire drawing machine, to prevent the surface roughness and ductility deterioration of the metal wire to be wire drawn, and to improve the life of the wire drawing die.
The lubricating liquid from which particles exceeding 20 μm in diameter have been removed by the centrifugal separation process is returned to the lubricating liquid tank, and the drawing process of the lubricating liquid is improved. Since the lubricity with the wire is improved, surface roughness and ductility deterioration of the metal wire to be drawn can be prevented, and the life of the wire drawing die is improved.

図１を参照し、金属線材伸線方法の実現に用いる伸線装置を説明する。伸線装置１は、伸線機２、遠心分離機３、潤滑液タンク４を備える。伸線機２は、潤滑液５（即ち、油成分を界面活性剤で乳化させたエマルジョン潤滑液）の満たされた潤滑液槽６、潤滑液槽６の潤滑液５中に配置された複数の伸線ダイス７、金属線材８の巻出部９及び巻取部１０などを備える。
表面にブラスメッキが施されたブラスメッキスチールワイヤのような金属線材８が潤滑液５中の伸線ダイス７に通されて伸線される。一定時間使用された潤滑液槽６内の潤滑液５が管１１を経由して遠心分離機３に送られる。遠心分離機３に送られてきた潤滑液５に３０Ｇ以上１５０Ｇ以下の重力加速度が加わるように遠心分離機３を駆動して潤滑液５中の不溶性蓄積不要物を分離除去する。３０Ｇより小さい重力加速度で遠心分離処理を行うと潤滑液５中の不溶性蓄積不要物を分離除去できず、このような潤滑液５を伸線処理に使用すると、不溶性蓄積不要物が伸線ダイス７と金属線材８との間に侵入することによって、伸線ダイス７と金属線材８との潤滑性が低下し、金属線材８の表面荒れや延性劣化、及び、伸線ダイス７の寿命の悪化を招く。また、１５０Ｇより大きい重力加速度で遠心分離処理を行うと潤滑液５中の水分と油分とが分離してしまい、この水分と油分とが分離した潤滑液５を用いて伸線処理を行うと、潤滑液５の潤滑性能が低下して伸線ダイス７と金属線材８との潤滑性が低下する。
さらに、遠心分離機３による遠心分離処理によって、粒径２０μｍを超える粒子を除去する。遠心処理によって除去された不溶性蓄積不要物と粒径２０μｍを超える粒子とが排出管１２を経由して遠心分離機３の機外に排出される。そして、遠心分離機３から不溶性蓄積不要物及び粒径２０μｍを超える粒子が除去された潤滑液５が遠心分離機３から管１３を経由して潤滑液タンク４に送られる。潤滑液タンク４から潤滑液５が管１４を経由して伸線機２の潤滑液槽６に送られる。つまり、潤滑液タンク４→潤滑液槽６→遠心分離機３→潤滑液タンク４→潤滑液槽６というように潤滑液５を循環させながら伸線処理を行う。
以上によって、遠心分離機３による遠心分離処理によって不溶性蓄積不要物及び粒径２０μｍを超える粒子の除去された潤滑液５が潤滑液槽６に供給される。不溶性蓄積不要物の除去された潤滑液５を潤滑液槽６に戻して伸線処理を行うことで、伸線ダイス７への不溶性蓄積不要物の進入を防止でき、伸線される金属線材８の表面荒れや金属線材８の延性劣化を防止できるとともに、伸線ダイスの７寿命が向上する。粒径２０μｍを超える粒子の除去された潤滑液５を潤滑液槽６に戻して伸線処理を行うことで、潤滑液５の伸線ダイス７への引き込み性が良くなり、伸線ダイス７と金属線材８との潤滑性が向上するので、伸線処理される金属線材８の表面荒れや延性劣化を防止できるとともに、伸線ダイス７の寿命が向上する。
即ち、潤滑液槽６内で一定時間伸線処理に使用された潤滑液５を遠心分離機３に送って遠心分離処理によって不溶性蓄積不要物及び粒径２０μｍを超える粒子の除去された潤滑液５を伸線処理に使用する潤滑液５として潤滑液槽６に戻して伸線処理を行うことで、表面荒れや延性劣化のない優れた金属線材８を得ることができるとともに、伸線ダイス７の寿命の向上を図ることが可能となった。
尚、遠心分離機３は、比重の違うものが混在した液を遠心力によって分離できるものであればよい。例えば、回転する容器の内部に潤滑液５を導入してスラッジを分離し、分離されたスラッジを容器内の内周壁に堆積し、この堆積したスラッジを定期的に排出する遠心分離機を用いればよい。 With reference to FIG. 1, a wire drawing apparatus used for realizing a metal wire drawing method will be described. The wire drawing device 1 includes a wire drawing machine 2, a centrifuge 3, and a lubricating liquid tank 4. The wire drawing machine 2 includes a lubricating liquid tank 6 filled with a lubricating liquid 5 (that is, an emulsion lubricating liquid obtained by emulsifying an oil component with a surfactant), and a plurality of the lubricating liquid tanks 6 disposed in the lubricating liquid 5 of the lubricating liquid tank 6. A wire drawing die 7, a wire wire unwinding portion 9, a winding portion 10 and the like are provided.
A metal wire 8 such as a brass-plated steel wire having a surface plated with brass is passed through a wire drawing die 7 in the lubricating liquid 5 and drawn. The lubricating liquid 5 in the lubricating liquid tank 6 used for a certain period of time is sent to the centrifuge 3 via the pipe 11. The centrifuge 3 is driven so that the gravitational acceleration of 30 G or more and 150 G or less is applied to the lubricating liquid 5 sent to the centrifugal separator 3 to separate and remove insoluble accumulation unnecessary substances in the lubricating liquid 5. When the centrifugal separation process is performed at a gravitational acceleration smaller than 30 G, insoluble accumulation unnecessary substances in the lubricating liquid 5 cannot be separated and removed. When such a lubricating liquid 5 is used for the wire drawing process, the insoluble accumulation unnecessary substances are drawn into the wire drawing die 7. Between the wire rod 8 and the metal wire 8 causes the lubricity between the wire drawing die 7 and the metal wire 8 to decrease, resulting in surface roughness and ductility deterioration of the metal wire 8 and deterioration of the life of the wire drawing die 7. Invite. In addition, when the centrifugal separation process is performed at a gravitational acceleration greater than 150 G, the water and the oil in the lubricating liquid 5 are separated, and when the drawing process is performed using the lubricating liquid 5 from which the water and the oil are separated, The lubricating performance of the lubricating liquid 5 is lowered, and the lubricity between the wire drawing die 7 and the metal wire 8 is lowered.
Furthermore, particles having a particle size of more than 20 μm are removed by a centrifugal separation process by the centrifugal separator 3. Insoluble accumulation unnecessary substances removed by centrifugation and particles having a particle size exceeding 20 μm are discharged out of the centrifuge 3 via the discharge pipe 12. Then, the lubricating liquid 5 from which insoluble accumulation unnecessary substances and particles having a particle diameter exceeding 20 μm have been removed from the centrifuge 3 is sent from the centrifuge 3 to the lubricating liquid tank 4 via the pipe 13. The lubricating liquid 5 is sent from the lubricating liquid tank 4 to the lubricating liquid tank 6 of the wire drawing machine 2 via the pipe 14. That is, the wire drawing process is performed while circulating the lubricating liquid 5 in the order of the lubricating liquid tank 4 → the lubricating liquid tank 6 → the centrifuge 3 → the lubricating liquid tank 4 → the lubricating liquid tank 6.
As described above, the lubricating liquid 5 from which insoluble accumulation unnecessary substances and particles having a particle diameter exceeding 20 μm are removed by the centrifugal separation process by the centrifugal separator 3 is supplied to the lubricating liquid tank 6. By returning the lubricating liquid 5 from which insoluble accumulation unnecessary substances have been removed to the lubricating liquid tank 6 and performing the wire drawing treatment, it is possible to prevent insoluble accumulation unnecessary substances from entering the wire drawing die 7 and to draw the metal wire 8 to be drawn. The surface roughness of the metal wire and the ductility deterioration of the metal wire 8 can be prevented, and the life of the wire drawing die is improved. By returning the lubricating liquid 5 from which particles having a particle size of more than 20 μm are removed to the lubricating liquid tank 6 and performing the wire drawing process, the drawability of the lubricating liquid 5 into the wire drawing die 7 is improved. Since the lubricity with the metal wire 8 is improved, surface roughness and ductility deterioration of the metal wire 8 to be drawn can be prevented, and the life of the wire drawing die 7 is improved.
That is, the lubricating liquid 5 used for the wire drawing process in the lubricating liquid tank 6 for a predetermined time is sent to the centrifuge 3 and the insoluble accumulation unnecessary substances and the particles having a particle diameter exceeding 20 μm are removed by the centrifugal process. Is returned to the lubricating liquid tank 6 as the lubricating liquid 5 used for the wire drawing treatment, and the wire drawing treatment is performed, whereby an excellent metal wire 8 having no surface roughness or ductility deterioration can be obtained. It has become possible to improve the service life.
In addition, the centrifuge 3 should just be what can isolate | separate the liquid in which the thing with different specific gravity was mixed by centrifugal force. For example, if a centrifuge that introduces the lubricating liquid 5 into a rotating container to separate sludge, deposits the separated sludge on the inner peripheral wall of the container, and periodically discharges the accumulated sludge is used. Good.

約０．８２重量パーセントの炭素を含有する直径５．５ｍｍの高炭素鋼線材に、直径が約１．７ｍｍになるまで繰り返し乾式伸線を施した後に、パテンティングのような熱処理、及び、ブラスメッキ処理を加えて準備した線材を上記伸線機にて伸線処理し、最終線径が直径０．３０ｍｍのスチールコード用ブラスメッキスチールワイヤを製造した。そして、伸線機２の潤滑液槽６で一定時間使用に供された潤滑液５を遠心分離機３に送り、５０Ｇ、１００Ｇ、１５０Ｇでそれぞれ潤滑液５を遠心分離処理した結果、処理後の潤滑液５の清浄度は良く、この潤滑液５を潤滑液槽６に戻して伸線処理を行った場合に伸線ダイス７の寿命が向上した。伸線機２の潤滑液槽６で一定時間使用に供された潤滑液５を遠心分離機３に送り、２００Ｇで潤滑液５を遠心分離処理した結果、５０Ｇ、１００Ｇ、１５０Ｇで遠心処理した場合と比べて、処理後の潤滑液５の清浄度は悪く、この潤滑液５を潤滑液槽６に戻して伸線処理を行った場合に伸線ダイス７の寿命も短くなった。伸線機２の潤滑液槽６で一定時間使用に供された潤滑液５を遠心分離機３に送り、２０Ｇで潤滑液５を遠心分離処理した結果、５０Ｇ、１００Ｇ、１５０Ｇで遠心処理した場合と比べて、処理後の潤滑液５の清浄度は悪く、また、２０μｍを超える粒子が残ったため、この潤滑液５を潤滑液槽６に戻して伸線処理を行った場合に伸線ダイス７の寿命も短くなった。   A high carbon steel wire having a diameter of 5.5 mm containing about 0.82 weight percent of carbon is repeatedly subjected to dry drawing until the diameter is about 1.7 mm, followed by heat treatment such as patenting, and brass The wire prepared by applying the plating treatment was drawn with the above-described wire drawing machine to produce a brass-plated steel wire for steel cord having a final wire diameter of 0.30 mm. Then, the lubricating liquid 5 that has been used for a certain period of time in the lubricating liquid tank 6 of the wire drawing machine 2 is sent to the centrifugal separator 3, and the lubricating liquid 5 is centrifuged at 50G, 100G, and 150G, respectively. The cleanliness of the lubricating liquid 5 was good, and the life of the wire drawing die 7 was improved when the lubricating liquid 5 was returned to the lubricating liquid tank 6 and the wire drawing process was performed. When the lubricating liquid 5 that has been used for a certain period of time in the lubricating liquid tank 6 of the wire drawing machine 2 is sent to the centrifuge 3 and the lubricating liquid 5 is centrifuged at 200 G, and is centrifuged at 50 G, 100 G, and 150 G. Compared with, the cleanliness of the lubricating liquid 5 after the treatment was poor, and when the lubricating liquid 5 was returned to the lubricating liquid tank 6 and the wire drawing process was performed, the life of the wire drawing die 7 was shortened. When the lubricating liquid 5 that has been used for a certain period of time in the lubricating liquid tank 6 of the wire drawing machine 2 is sent to the centrifuge 3, and the lubricating liquid 5 is centrifuged at 20G, and is centrifuged at 50G, 100G, and 150G. Compared to the above, the cleanliness of the lubricating liquid 5 after the treatment is poor, and particles exceeding 20 μm remain. Therefore, when the lubricating liquid 5 is returned to the lubricating liquid tank 6 and the drawing process is performed, the wire drawing die 7 is used. The lifespan of the was shortened.

本発明は、銅線のような金属線材の伸線方法にも適用できる。   The present invention can also be applied to a method of drawing a metal wire such as a copper wire.

金属線材伸線方法に用いる伸線装置を示す図（最良の形態１）。The figure which shows the wire drawing apparatus used for the metal wire drawing method (best form 1).

符号の説明Explanation of symbols

１ 伸線装置、２ 伸線機、３ 遠心分離機、５ エマルジョン潤滑液、６ 潤滑液槽７ 伸線ダイス、８ 金属線材。   DESCRIPTION OF SYMBOLS 1 Wire drawing apparatus, 2 wire drawing machine, 3 centrifuge, 5 emulsion lubricating liquid, 6 lubricating liquid tank 7 wire drawing die, 8 metal wire.

Claims (2)

金属線材をエマルジョン潤滑液の満たされた潤滑液槽中で伸線ダイスによって伸線処理する金属線材伸線方法において、一定時間伸線処理に使用されたエマルジョン潤滑液槽内のエマルジョン潤滑液を遠心分離機に送って遠心分離機にて３０Ｇ以上１５０Ｇ以下の重力加速度で遠心分離処理することによってエマルジョン潤滑液中の不溶性蓄積不要物を除去した後に伸線処理に使用するエマルジョン潤滑液として潤滑液槽に戻して伸線処理を行うことを特徴とする金属線材伸線方法。   In a metal wire drawing method in which a metal wire is drawn by a drawing die in a lubricating liquid tank filled with an emulsion lubricating liquid, the emulsion lubricating liquid in the emulsion lubricating liquid tank used for the drawing process for a predetermined time is centrifuged. Lubricating liquid tank as an emulsion lubricating liquid used for wire drawing after removing insoluble accumulation unnecessary substances in the emulsion lubricating liquid by centrifugal separation with gravity acceleration of 30G to 150G in a centrifugal separator A metal wire drawing method characterized in that the wire drawing treatment is performed after returning to step (b). 一定時間伸線処理に使用されたエマルジョン潤滑液を遠心分離機で遠心処理することによってエマルジョン潤滑液中に含まれた２０μｍを超える粒子を除去したことを特徴とする請求項１に記載の金属線材伸線方法。   2. The metal wire according to claim 1, wherein particles exceeding 20 μm contained in the emulsion lubricating liquid are removed by centrifuging the emulsion lubricating liquid used for the wire drawing treatment for a predetermined time with a centrifuge. Drawing method.
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JP2011147963A (en) * 2010-01-21 2011-08-04 Bridgestone Corp Lubricant regenerating method
US20170044463A1 (en) * 2015-08-11 2017-02-16 Hitachi Metals, Ltd. Processing method and purification system
US11015373B2 (en) 2014-11-18 2021-05-25 Invue Security Products Inc. Key and security device

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JPH07328888A (en) * 1994-06-01 1995-12-19 Mitsubishi Materials Corp Circulating reproducing device for metal work liquid
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011147963A (en) * 2010-01-21 2011-08-04 Bridgestone Corp Lubricant regenerating method
US11015373B2 (en) 2014-11-18 2021-05-25 Invue Security Products Inc. Key and security device
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US10266789B2 (en) 2015-08-11 2019-04-23 Hitachi Metals, Ltd. Processing method and purification system

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